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Luminance of center point: L=L(5)
Brightness Uniformity Measurement points: Five specified points 1-5
Formula: Maximum [L (1), L (2), L (3), L (4), L (5)]/Minimum [L (1), L (2), L (3), L (4),
L (5)]
Note (3) Definition of Response Time (T
Gray Level 255
100%
90%
Optical
10%
Response
0%
Note (4)
Measurement Setup:
The LCD module should be stabilized at given temperature for 20 minutes
to avoid abrupt temperature change during measuring. In order to stabilize
the luminance, the measurement should be executed after lighting Backlight
for 20 minutes in a windless room.
Note (5) Definition of TCO 99 Luminance Uniformity (Angular-dependent) (LR):
R
Gray Level 0
LCD
Module
LCD Panel
Center of the
Screen
Field of View =
2º
500 mm
, T
):
F
Photometer
(TOPCON BM-
5A)
Light Shield Room
(Ambient Luminance < 2
lux)
11
Gray Level 255
Time
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